Basilan

The province of Basilan has an aggregate historical jurisdiction of 135,892 hectares (335,800 acres), with mainland Basilan encompassing an area of 124,892 hectares (308,610 acres). The province encompasses all of Basilan Island (including Isabela City, which forms part of the province, although it is excluded from the Autonomous Region) and offshore islands, together with the Pilas island group (now Hadji Muhtamad Municipality) west of the island, and the Bubuan and Tapiantana island group (now Tabuan-Lasa Municipality) in the south. These are listed among the Philippine islands with a moderate risk of getting hit by tsunamis.